fix formatting

src/main/java/net/snowflake/client/core/arrow/ArrayConverter.java

@@ -1,6 +1,5 @@
 package net.snowflake.client.core.arrow;
 
-import java.nio.charset.StandardCharsets;
 import net.snowflake.client.core.DataConversionContext;
 import net.snowflake.client.core.SFException;
 import net.snowflake.client.core.arrow.tostringhelpers.ArrowArrayStringRepresentationBuilder;

src/main/java/net/snowflake/client/core/arrow/MapConverter.java

@@ -1,6 +1,5 @@
 package net.snowflake.client.core.arrow;
 
-import java.nio.charset.StandardCharsets;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;

src/main/java/net/snowflake/client/core/arrow/StructConverter.java

@@ -1,6 +1,5 @@
 package net.snowflake.client.core.arrow;
 
-import java.nio.charset.StandardCharsets;
 import net.snowflake.client.core.DataConversionContext;
 import net.snowflake.client.core.SFException;
 import net.snowflake.client.core.SnowflakeJdbcInternalApi;

src/main/java/net/snowflake/client/core/arrow/VectorTypeConverter.java

@@ -1,6 +1,5 @@
 package net.snowflake.client.core.arrow;
 
-import java.nio.charset.StandardCharsets;
 import java.util.List;
 import net.snowflake.client.core.DataConversionContext;
 import net.snowflake.client.core.SFException;

src/main/java/net/snowflake/client/core/json/BytesConverter.java

@@ -1,7 +1,6 @@
 package net.snowflake.client.core.json;
 
 import java.nio.ByteBuffer;
-import java.nio.charset.StandardCharsets;
 import java.sql.Types;
 import net.snowflake.client.core.SFException;
 import net.snowflake.client.jdbc.ErrorCode;